杉木人工林树冠最大重叠系数及适宜经营密度的研究

Study on Maximum Crown Overlappable Coefficient and Optimum Managing Density of Chinese Fir Forest Plantation

本文在证明了开化县不同立地条件下松木胸径与冠幅相关规律无显著差异的基础上,建立了全县杉木胸径与冠幅的回归模型InCw=-0.2538+0.48221nD,R=0.9972,S=0.0480,并以此确定了杉木林分处于不同径阶时的基本经营密度指标。通过分析,本文提出了一种估计杉木林树冠最大可重叠系数K值的方法,修正了以往对K值估计偏小的现象。运用该K值计算了杉木人工林的饱和密度,并由此推导出了不同立地条件下郁闭度分别为0.6,0.7,0.8和0.9时的杉木经营密度指标。

This paper testified that there was no close relationship between DBH and crown of C. lanceolata among the different site index classes in Kaihua County, Zhejiang Province. On this basis, the regressive equation about the DBH and the crown was set up where related coefficient was 0.9972 and standard deviation 0.048, and then the basic managing density was determined. The authors put forward a new method to estimate maximum crown overlappable coefficient (K-value). Using the K-value,the stand saturation density and the density index under different site condition were calculated when the canopy desity was 0.6, 0.7, 0.8 and 0.9, respectively.